Singh Umesh Kumar, Kumar Manish, Chauhan Rita, Jha Pawan Kumar, Ramanathan Al, Subramanian V
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, India.
Environ Monit Assess. 2008 Jun;141(1-3):309-21. doi: 10.1007/s10661-007-9897-6. Epub 2007 Sep 26.
In present study focus has been given on estimating quality and toxicity of waste with respect to heavy metals and its impact on groundwater quality, using statistical and empirical relationships between different hydrochemical data, so that easy monitoring may be possible which in turn help the sustainable management of landfill site and municipal solid waste. Samples of solid waste, leachate and groundwater were analyzed to evaluate the impact of leachates on groundwater through the comparison of their hydrochemical nature. Results suggest the existence of an empirical relationship between some specific indicator parameters like heavy metals of all three above mentioned sample type. Further, K/Mg ratio also indicates three groundwater samples heavily impacted from leachate contamination. A good number of samples are also showing higher values for NO(3)(-) and Pb than that of World Health Organization (WHO) drinking water regulation. Predominance of Fe and Zn in both groundwater and solid waste samples may be due to metal plating industries in the area. Factor analysis is used as a tool to explain observed relation between numerous variables in term of simpler relation, which may help to deduce the strength of relation. Positive loading of most of the factors for heavy metal clearly shows landfill impact on ground water quality especially along the hydraulic gradient. Cluster analysis, further substantiates the impact of landfill. Two major groups of samples obtained from cluster analysis suggest that one group comprises samples that are severely under the influence of landfill and contaminated leachates along the groundwater flow direction while other assorted with samples without having such influence.
在本研究中，重点是通过利用不同水化学数据之间的统计和经验关系，估算废物中重金属的质量和毒性及其对地下水质量的影响，以便进行易于监测，这反过来有助于填埋场和城市固体废物的可持续管理。分析了固体废物、渗滤液和地下水的样本，通过比较它们的水化学性质来评估渗滤液对地下水的影响。结果表明，上述三种样本类型中的某些特定指标参数（如重金属）之间存在经验关系。此外，钾/镁比值也表明三个地下水样本受到渗滤液污染的严重影响。大量样本的硝酸盐（NO₃⁻）和铅含量也高于世界卫生组织（WHO）的饮用水标准。地下水和固体废物样本中铁和锌占主导地位可能是由于该地区的金属电镀行业。因子分析被用作一种工具，以更简单的关系来解释众多变量之间观察到的关系，这可能有助于推断关系的强度。大多数重金属因子的正载荷清楚地表明了填埋场对地下水质量的影响，特别是沿着水力梯度方向。聚类分析进一步证实了填埋场的影响。聚类分析得到的两组主要样本表明，一组样本受到填埋场和沿地下水流向的受污染渗滤液的严重影响，而另一组样本则没有这种影响。
